diff --git a/packages/type-testing/package.json b/packages/type-testing/package.json
index 2b583f2..e2d12c4 100644
--- a/packages/type-testing/package.json
+++ b/packages/type-testing/package.json
@@ -41,6 +41,6 @@
   "devDependencies": {
     "@vitest/coverage-v8": "^2.0.0",
     "typescript": "^5.0.0",
-    "vitest": "^2.1.9"
+    "vitest": "^4.1.10"
   }
 }